The statement itself is probably a reference to the narrator's gradually declining mental health. By sliding, both the penguin and Marla are suggesting that he let go of reality and enter into his own delusions. Following this train of thought, this could be the moment when the narrator actually snaps, the therapy sessions that he sought for comfort actual cause his downfall, and depending on who you talk to, his resurrection.

A multiplayermod for the game Quake. A typical Slide map consists of a large sloping track (like a snowboarding run). At the top of the track, there is a gateway, that when passed through equips the player with a hoverboard. The player can then board down the track and try to achieve the fastest time. However, an alternative mode of play is available (usually to players who have reached the bottom of the track, but sometimes reachable from other places on the course): Instead of getting a board, the player can explore the gantries and spectator areas on foot, and find prime sniping positions to attack the racing players.

There are checkpoints that must be passed to complete the track, as well as frag powerups (kinda like Mario Kart coins), and the ability to jettison your board if you are hopelessly short of momentum. Slide was absolutely excellent, one of the best mods I've played, and it is a mystery to me why no-one ever developed a version for any subsequent FPS.

Slide box Steam Engine, a steam chest. See under Steam. -- Slide lathe, an engine lathe. See under Lathe. -- Slide rail, a transfer table. See under Transfer. -- Slide rest Turning lathes, a contrivance for holding, moving, and guiding, the cutting tool, made to slide on ways or guides by screws or otherwise, and having compound motion. -- Slide rule, a mathematical instrument consisting of two parts, one of which slides upon the other, for the mechanical performance of addition and subtraction, and, by means of logarithmic scales, of multiplication and division. -- Slide valve. (a) Any valve which opens and closes a passageway by sliding over a port. (b) A particular kind of sliding valve, often used in steam engines for admitting steam to the piston and releasing it, alternately, having a cuplike cavity in its face, through which the exhaust steam passes. It is situated in the steam chest, and moved by the valve gear. It is sometimes called a D valve, -- a name which is also applied to a semicylindrical pipe used as a sliding valve.

In the illustration, a is the cylinder of a steam engine, in which plays the piston p; b the steam chest, receiving its supply from the pipe i, and containing the slide valve s, which is shown as admitting steam to one end of the cylinder through the port e, and opening communication between the exhaust passage f and the port c, for the release of steam from the opposite end of the cylinder.